From: Chen Ganir <chen.ganir@xxxxxx>
Add support for emitting PropertyChanged when a battery level
characteristic notification is sent from the peer device.
---
profiles/battery/battery.c | 100 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 98 insertions(+), 2 deletions(-)
diff --git a/profiles/battery/battery.c b/profiles/battery/battery.c
index f733ff6..ac0e706 100644
--- a/profiles/battery/battery.c
+++ b/profiles/battery/battery.c
@@ -43,6 +43,7 @@ struct battery {
GAttrib *attrib; /* GATT connection */
guint attioid; /* Att watcher id */
struct att_range *svc_range; /* Battery range */
+ guint attnotid; /* Att notifications id */
GSList *chars; /* Characteristics */
};
@@ -56,6 +57,7 @@ struct characteristic {
uint8_t ns; /* Battery Namespace */
uint16_t description; /* Battery description */
uint8_t level; /* Battery level */
+ gboolean can_notify; /* Char can notify flag */
};
struct descriptor {
@@ -86,6 +88,14 @@ static void char_free(gpointer user_data)
g_free(c);
}
+static gint cmp_char_val_handle(gconstpointer a, gconstpointer b)
+{
+ const struct characteristic *ch = a;
+ const uint16_t *handle = b;
+
+ return ch->attr.value_handle - *handle;
+}
+
static void battery_free(gpointer user_data)
{
struct battery *batt = user_data;
@@ -96,8 +106,14 @@ static void battery_free(gpointer user_data)
if (batt->attioid > 0)
btd_device_remove_attio_callback(batt->dev, batt->attioid);
- if (batt->attrib != NULL)
+ if (batt->attrib != NULL) {
+ if (batt->attnotid) {
+ g_attrib_unregister(batt->attrib, batt->attnotid);
+ batt->attnotid = 0;
+ }
+
g_attrib_unref(batt->attrib);
+ }
btd_device_unref(batt->dev);
g_free(batt->svc_range);
@@ -140,6 +156,18 @@ static void process_batteryservice_char(struct characteristic *ch)
}
}
+static void batterylevel_enable_notify_cb(guint8 status, const guint8 *pdu,
+ guint16 len, gpointer user_data)
+{
+ struct characteristic *ch = user_data;
+
+ if (status != 0) {
+ error("Could not enable batt level notification.");
+ ch->can_notify = FALSE;
+ process_batteryservice_char(ch);
+ }
+}
+
static gint device_battery_cmp(gconstpointer a, gconstpointer b)
{
const struct characteristic *ch = a;
@@ -176,6 +204,21 @@ static void batterylevel_refresh_cb(struct btd_battery *batt)
process_batteryservice_char(ch);
}
+static void enable_battery_notification(struct characteristic *ch,
+ uint16_t handle)
+{
+ uint8_t atval[2];
+ uint16_t val;
+
+ val = GATT_CLIENT_CHARAC_CFG_NOTIF_BIT;
+
+ ch->can_notify = TRUE;
+
+ att_put_u16(val, atval);
+ gatt_write_char(ch->batt->attrib, handle, atval, 2,
+ batterylevel_enable_notify_cb, ch);
+}
+
static void batterylevel_presentation_format_desc_cb(guint8 status,
const guint8 *pdu, guint16 len,
gpointer user_data)
@@ -211,6 +254,14 @@ static void process_batterylevel_desc(struct descriptor *desc)
char uuidstr[MAX_LEN_UUID_STR];
bt_uuid_t btuuid;
+ bt_uuid16_create(&btuuid, GATT_CLIENT_CHARAC_CFG_UUID);
+
+ if (bt_uuid_cmp(&desc->uuid, &btuuid) == 0 && g_strcmp0(ch->attr.uuid,
+ BATTERY_LEVEL_UUID) == 0) {
+ enable_battery_notification(ch, desc->handle);
+ return;
+ }
+
bt_uuid16_create(&btuuid, GATT_CHARAC_FMT_UUID);
if (bt_uuid_cmp(&desc->uuid, &btuuid) == 0) {
@@ -316,12 +367,54 @@ static void configure_battery_cb(GSList *characteristics, guint8 status,
}
}
+static void proc_batterylevel(struct characteristic *c, const uint8_t *pdu,
+ uint16_t len, gboolean final)
+{
+ if (!pdu) {
+ error("Battery level notification: Invalid pdu length");
+ return;
+ }
+
+ c->level = pdu[1];
+
+ btd_device_set_battery_opt(c->devbatt, BATTERY_OPT_LEVEL, c->level,
+ BATTERY_OPT_INVALID);
+}
+
+static void notif_handler(const uint8_t *pdu, uint16_t len, gpointer user_data)
+{
+ struct battery *batt = user_data;
+ struct characteristic *ch;
+ uint16_t handle;
+ GSList *l;
+
+ if (len < 3) {
+ error("notif_handler: Bad pdu received");
+ return;
+ }
+
+ handle = att_get_u16(&pdu[1]);
+ l = g_slist_find_custom(batt->chars, &handle, cmp_char_val_handle);
+ if (l == NULL) {
+ error("notif_handler: Unexpected handle 0x%04x", handle);
+ return;
+ }
+
+ ch = l->data;
+ if (g_strcmp0(ch->attr.uuid, BATTERY_LEVEL_UUID) == 0) {
+ proc_batterylevel(ch, pdu, len, FALSE);
+ }
+}
+
static void attio_connected_cb(GAttrib *attrib, gpointer user_data)
{
struct battery *batt = user_data;
batt->attrib = g_attrib_ref(attrib);
+ batt->attnotid = g_attrib_register(batt->attrib, ATT_OP_HANDLE_NOTIFY,
+ notif_handler, batt, NULL);
+
if (batt->chars == NULL) {
gatt_discover_char(batt->attrib, batt->svc_range->start,
batt->svc_range->end, NULL,
@@ -330,7 +423,8 @@ static void attio_connected_cb(GAttrib *attrib, gpointer user_data)
GSList *l;
for (l = batt->chars; l; l = l->next) {
struct characteristic *c = l->data;
- process_batteryservice_char(c);
+ if (!c->can_notify)
+ process_batteryservice_char(c);
}
}
}
@@ -339,6 +433,8 @@ static void attio_disconnected_cb(gpointer user_data)
{
struct battery *batt = user_data;
+ g_attrib_unregister(batt->attrib, batt->attnotid);
+ batt->attnotid = 0;
g_attrib_unref(batt->attrib);
batt->attrib = NULL;
}
--
1.7.9.5
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